-i, --stripes Stripes
Gives the number of stripes. This is equal to the number of physical volumes to scatter the logical volume.

条带大小，和数据库块大小一致，例如postgresql默认为 8KB。

-I, --stripesize StripeSize
Gives the number of kilobytes for the granularity of the stripes.
StripeSize must be 2^n (n = 2 to 9) for metadata in LVM1 format. For metadata in LVM2 format, the stripe size may be a larger power of 2 but must not exceed the physical extent size.

创建快照时，指定的参数chunksize, 最好和数据库的块大小一致, 例如postgresql默认为 8KB。

-c, --chunksize ChunkSize
Power of 2 chunk size for the snapshot logical volume between 4k and 512k.